Mechanical movement.



Nb. 628,220. Patented July4, |899.

n. L. cnossMAN.

MECHANICAL MVEMENT.

(Application Bled Hay 2, 1898.)

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7%-0- f/MW/@ ozeF/f/J @msm lno. 628,220". 'Patented luly 4, |899.

n. L. cnossMAN. MECHANICAL HOVEMENT.-

` (Application med luy 2, 1898.)

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m: wams PETERS w. PHoTn-Lmw., wswmoron. u, c.

UNITED STATESv PATENT OFFICE.

ROBERT L. CROSSMAN, OF TAUNTON, MASSACHUSETTS, ASSIGNOR OF ONE- THIRD TOTHE HUBER PRINTING PRESS COMPANY, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 628,220, dated July 4,1899.

Application filed May 2, 1898. Serial No. 679,411. (No model.)

T0 all whom t may concern:

' Be it known that I, ROBERT L. CEossMAN, of Taunton, county of Bristol,State of Massachusetts, have invented an Improvement in MechanicalMovements, of which the following description, in connection with theaccompanying drawings, is a specification, like letters and numerals onthe drawings representing like parts.

This invention relates to a mechanical movement whereby a rotarymovement is transformed into a rectilinear or reciprocating movement,and is particularly adapted for use in imparting a reciprocatingmovement to the beds of printing-presses. When used in such connection,my invention has ,for its object the conversion of the rotary movementof a driving member into rectilinear or reciprocating movement of thepart to be reciprocated-such, for instance, as the type-bed-so that thebed shall be moved uniformly throughout the greater part of its travel,and as the limit of its traverse in .either direction is approached togradually parallel rack-bars attached to or movablev with the bed,though it is to be understood that this is only one application ofmyinvention and that my invention is not restricted to such applicationnor to its application in a printing-press provided with the mechanismherein shown for effecting the greater portion of the stroke of the bed.

The double-rack and cooperating gear mechanism herein shown is of thattype wherein the racks are arranged one above the other, but not in thesame vertical plane, the driving-gear being located between the racksand being brought into engagement alternately therewith by a relativelateral movement of said racks and gear, the shiftingbeing effected by'any suitable means not in itself forming any part of my invention.

Figure l is a vertical longitudinal sectional View of the part to. bereciprocated on the line cc Fig. 6, with one embodiment of my inventionapplied thereto. Fig. 2 is a plan View thereof below the line 0c' Qc',Fig, l. Fig. 3 55 is aview similar to Fig. l, the reciprocating member,however, being shown at the eX- treme limit of its traverse in onedirection. Fig. 4 is alike view, partially broken out to save space,showing the position of the va- 6o rious parts after the reciprocatingmember has been started on its return stroke or movement. Fig. 5 is asimilar view showing the position of the parts when the reciprocatingmember has approachedthe end of its uni- '65 form speed on suchreturn-stroke; and Fig. 6

is a transverse sectional view of the mechanism shown in Fig. 1,011 theline @c2 :t2 thereof, looking to the right.

The supporting-frame A is provided with 7o suitable guideways A', uponwhich the typebed or reciprocating member B is mounted and slides, and Ihave herein shown hangers b depending from the bed to support the lowerrack-bar R', the upper and parallel rack-bar 75 R being secured. to theunder side of the bed in suitable manner, said rack-bars lbeing 1ocatedin different vertical planes, as clearly shown in Fig. (i.

A transverse main driving-shaft D, sup- 8o ported in bearings A on theframe, is provided with a broad pinion CZ in mesh With an actuatingmember, shown as a gear dx, fast on a longitudinally-movable shaft D',supported in the frame, said shaft having an annularly-grooved collar dthereon, engaged by a pin on a rocker-arm d2, said arm being rocked atthe proper time byacam cl3 on ashaft D2, which shaft is rotated by meansof suitable gears S, 9, l0, and l2 from the driving-shaft. 9o By meansof the mechanism described the bed B is, by the engagement of theactuating member or gear dx with one of the racks, driven at a uniformspeed in one direction until the end of the engaged rack isdirectlyabove 9 5 the vertical diameter of the gear dx, as inFig.

l, and at such time the cam d3 operates by the intervening connectionsto shift the gear CZX from engagement with such rack, and While the gearmakes a half-revolution itis brought 10o into position 'to engage theother rack, and thereby drive the bed in the reverse direction'until theend of the latter rack reaches the point of disengagement with theactuating-gear. Thus the part to be reciprocated will be driven at auniform speed throughout the greater portion of its stroke. After a rackand the actuating-gear are disengaged the movement of the bed is to becontinued with a graduallyretarded speed until the bed is brought to astandstill, and then the bed is started and moved with agraduallyaccelerated speed upon its return movement, all while theactuating-gear is moving from engagement with one rack into engagementwith the other.

On the inner face of the gear (ZX are located three laterally-extendedcrank pins or studs 2, 3, and 4, which may be provided with rolls, ifdesired, the pins 2 and 3 being shown as equidistant from the center ofrotation of the gear and near the periphery of the latter, while the pin-l is nearer the center of the gear and equidistant from the pins 2and3.

Each hanger b is provided on itsinner face with outwardly-divergingguideways formed by short inclined shoes b b2, near the top and bottomof the hanger, and a long double shoe bx, the inclined faces b3 b4thereof being parallel to the outer faces of the short shoes, whichlatter are at such an angle that they willbe radial to the axis of thegear ZX when the shift of the latter from one to the other rack-bar iseffected. The pins 2 and 3 are long enough to enter the guideways at theproper times irrespective of the position of the actuating-gearrelatively to either rack.

I have herein shown a curved shoe b5 located on and at the apex of thedouble shoe bx, the convex face of the shoe being outwardly 'turned andhaving the same curvature as the path of the crank-pin 4, which latteris herein shown as shorter than the crank-pins 2 and 3 in order to clearthe double shoe bX.

Referring to Fig. l, the reciprocating member B and actuating-gear (ZXare moving in the direction ofarrows 20 and 25, respectively, and thesaid gear has reached the point of disengagement with the rack R, whilethe crankpin 3 has just moved into the upper guideway into engagementwith the shoe b'. As the crank-pin 3 continues to move the Inovement ofthe bed B in the direction of the arrow 2O will be maintained by orthrough the pin and at substantially uniform speed until said crank-pinpasses over dead-center. From such point the speed of the member B willbe gradually decreased, the long face b3 of the shoe bX preventingoverrun ning, and just as the pin 3 moves out of the guideway and isdisengaged from the shoe b' the pin 4 engages the curved shoe b5, themovement of the reciprocating member or bed B being finally stopped whenthe crank-pin 4 reaches the center of said shoe b5, as shown in Fig. 3.At such time the pins 2 and 3 are in engagement with the faces b3 b4,respectively, of the shoe bx, equidistant from its ends, and from thispoint the crank-pins 2 and 3 effect the movement of the bed B to theright, Fig. 3, with a gradually-accelerated speed, the grad- 'ualadvance of the pin 4 to the right while moving over the lower half ofthe shoe b5 permitting the movement of the bed, while at the same timekeeping the shoe bxin engagement with the crank-pins 2 and 3 until theparts assume the position shown in Fig. 4. Vhen the pin 3 has passed theapex of the double shoe, it ceases to inuence the move ment of the bedB, which movement is then continued by the pin 2, the inner pin 4 thenpassing from the shoe b5 and across the vertical side of the shoe bx. Bythis time the crank-pin 2 has entered between the shoes b2 and bx, theformer preventing overrunning of the mechanism, and said pin retainscontrol of the bed until it passes beyond the shoe bXjust as the gear(ZX comes into engagement with the rack R and completes the major partof the stroke to the right. The crankpins and cooperating shoes thusconstitute reversing means for the reciprocatory member, and the latteris under the complete control of said means from the instant ofdisengagement of the actuating-gear and one rack to theinstant ofitsengagement with the other rack.

In Fig. 5 the bed has nearly completed its stroke to the right atuniform speed and the crank-pin 3 is about to engage the smallshoe b2 toassume control of the bed after disengagement of the gear (ZX and ArackR' and continue the stroke while gradually decreasing the speed, the pin4 meanwhile coming into engagement with the shoe b5 at its lower cornerand passing thence to the center of its curved face, when the movementof the bedy is stopped. Meanwhile the crank-pin 2 will have moved intoengagement with the face b3 of the shoe b ready to start the movementinthe opposite direction, acting vin conjunction with the pin 3 on theface b, while the pin 4 will complete its travel over the upper half ofthe curved shoe b5 and pass therefrom.

The shoes b and b2 are made short in order to permit the entrance andexit of the outer crank-pins 2and 3 from the guideways formed by saidshoes and the shoe bx, and,if desired, the inner ends of the short shoesmay be beveled or rounded, as shown, to facilitate the entrance and exitof the crank-pins.

My invention is not restricted to the precise construction andarrangement herein shown, for the same may be varied or modied withoutdeparting from the spiritand scope of my invention.

Having thus fully described my invention in a practical embodimentthereof, what I claim, and desire to secure by Letters Patent,

l. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its IOO IIO

movement, of reversing mechanism comprising two rotatable crank-pins,and two oppositely-inclined guideways movable with the reciprocatingpart, one of said crank-pins cooperating with one of the guideways toinstitute, and the other crank-pin coperating with the other guideway toterminate, the reversing, and meansto control the part to bereciprocated during the intermediate period of reversing, substantiallyas described.

2. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its movement,of reversing mechanism comprising two rotatable crank-pins, and twooppositely-inclined shoes movable with the reciprocating part, saidcrank-pins each engaging one of said shoes, successively, torespectively institute and terminate the reversing, and means to controlthe part to be reciprocated during the intermediate period of reversing,substantially las described.

3. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its movement,of two rotatable crank-pins, and means in connection with saidreciprocating part, for engagement by said pins, whereby the speed ofsaid part is gradually decreased, the part stopped, and thereafterstarted in the opposite direction with a gradually-accelerated speed,substantially as described.

4. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its movement,of two rotatable crank-pins, and means at each end of the said part tobe reciprocated, for engagement by both of said pins, and separate meansto control the reciprocating part at the period of reversal of itsdirection of movement, whereby the speed of said part is graduallydecreased, the part stopped, and thereafter started in the oppositedirection with a gradually-accelerated speed, substantially asdescribed.

5. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its movement,oftwo rotatable crank-pins, means in connection with said reciprocatingpart, for engagement by said pins, whereby the speed of said part isgradually decreased, the part stopped, and thereafter started intheopposite direction with a gradually-accelerated speed, and separatemeans to control said reciprocating part atthe period of reversal of itsdirection of movement, substantially as described.

6. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its movement,of three rotatable crank-pins fixed relatively, and means in connectionwith said reciprocatingl part, for engagement by said pins, whereby thespeed of said part is gradually decreased, the part stopped, andthereafter started in the opposite direction with agradually-accelerated speed, substantially as described.

7. The combination with the part to be reciprocated and means forreciprocating the same throughout the greater portion of its movement,of two controlling members movable in a Xed circular path, and twooppositely-inclined guideways movable with said part to be reciprocated,to be engaged by-both of said controlling members at each period ofreversal, whereby the direction of movement of the part to bereciprocated is reversed while governed by said controlling members,substantially as described.

8. The part to be reciprocated, and means for effecting thereciprocation of said part throughout the greater portion of itsmovement, combined with three rotatable relatively-iXed crank members,two inclined guideways movable with the reciprocating part and withwhich two of the crank members cooperate to respectively institute andterminate the reversal of said part, and means in connection with saidpart, to cooperate with the third crank member and control thereciprocatory part during the middle period of reversing, substantiallyas described.

9. The part to be reciprocated, rack-andpinion mechanism for effectingthe reciprocation thereof throughout the greater portion of itsmovement,two crank members rotatable .coincidentally with the gear, andinclinedy shoes in connection with said reciprocatory part, forengagement by said crank members, to gradually decrease the speed ofsaid reciprocatory part and gradually increase its speed in the oppositedirection, respectively, said crank-pin serving to prevent overrunningof said reciprocatory part, substantially as described.

10. The part to be reciprocated, rack-andpinion mechanism for effectingthe reciprocation thereof throughout the greater portion of itsmovement, two crank-pins on said gear and equidistant from its axis ofrotation, a third pin thereon nearer its axis, and means at each end ofsaid part to be reciprocated, to be engaged by said pins, whereby thegradual reduction in speed, of said part, stoppage, and starting thereofin the opposite direction is effected, substantially as described.

11. The part to be reciprocated, means forreciprocating it throughoutthe greater portion of .its movement, two rotatable crankpins having asingle path of movement, two projections or shoes carried by said partto be reciprocated and oppositely inclined to the line of travelthereof, and adapted to be cooperatively engaged by said crank-pins, toinstitute and terminate the reversing, an intermediate shoe carried bythe reciprocatory part, and a separate coperating crank-pin,substantially as described.

12.- The part to be reciprocated, means for reciprocating it throughoutthe greater portion of its movement, two rotatable crankpins having asingle path of movement, two

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projections or shoes at cach end of said part l to cooperate only withthe curved shoe, sul) to be reciprocated and oppositely inclined to theline of travel thereof, and adapted to be cooperatively engaged by saidcrank-pins, to institute and terminate the reversing, an intermediateshoe carried by the reciprocatory part, and a separate cooperatingcranlvpin, substantially as described.

13; The part to be reciprocated, meansV to reciprocate it throughout thegreater portion of its movement, two rotatable crank-pins movable in asingle path, oppositely-inelined guideways carried by the part to bereciprocated, each guideway formed by a long and a short shoe inparallelism, an intermediate curved shoe, and a third rotatablecrank-pin to cooperate therewith, substantially as described.

14. The part to be reciprocated, means to reciprocate it throughout thegreater portion of its movement, two rotatable crank-pins movable in asingle path, o1 positelyinclined guideways at each end of the part to bercciprocated, each guideway formed by a long and a short shoe inparallelism, an intermediate curved shoe, and a third rotatable crankpinto coperate therewith, substantially as described.

15. The part to be reciprocated, means to reciprocate it throughout thegreater portion of its movement, two rotatable crank-pins movable in asingle path, oppositely-inclined guideways carried by the part to bereciprocated, each guideway formed by a long and a short shoe inparallelism, an intermediate curved shoe at the apex of the two longshoes and higher than the latter, and a. third rotatable crank-pinshorter than the other two,

stantially as described.

16. The combination with the part to be reciprocated and means forreciprocating said part throughout the greater portion of its movement,of a plurality of rotatable crank members, inclined shoes in connectionwith said part to be reciprocated, to be engaged by all of said crankmembers at each reversal, and means to retain the latter in engagementwith the shoes during the control of the reciprocatory part by the crankmembers, substantially as described.

17. A part to be reciprocated and means to reciprocate it throughout thegreater portion ofits movement, said means comprisingracks and arotatable gear, relative lateral movement of said racks and geareffecting disengagement of one of said racks and the gear and bringingthe latter into engagement with the other rack, combined with reversingmeans for the part to be reciprocated, said reversing means comprising aplurality ot crank-pins on said gear, oppositely-inclined guidewayscarried by the part to be reciprocated, one of said crank-pinsinstituting and the other terminating the reversal by respectiveengagement with said guideways, and means to control the reciprocatorypart during the middle period, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT L. CROSSMAN.

Vitnesses:

BERTHOLD HUBER, W. K. HODGMAN.

